Data Erasing Circuit Voltage Control
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Solution Overview
Problem
In non-transitory storage devices, the climbing signal generation circuit for data erasing faces challenges where the startup voltage for high voltage conduction tubes increases with repeated data erasing operations, leading to a drop in maximum voltage output and affecting the erasing effect, while conventional solutions to improve erasing effect by raising the voltage result in a significant enlargement of the high voltage generation unit and circuit area.
Innovation Solution
A circuit for data erasing that includes a high voltage generation unit, first and second control units, a lift unit, a switch unit, and a reference current generation unit, which modify the erasing signal to achieve a slower voltage ascending speed and control the electrical access between the high voltage generation unit and the output, allowing for improved erasing effect without enlarging the high voltage generation unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the voltage of the high voltage erasing signal is raised to improve the erasing effect, then the erasing effect is improved, but the area of the high voltage generation unit is apparently enlarged, so that area occupied by the entire circuit is enlarged greatly
Solution Approach 1:
The patent applies dynamics by making the conduction tube's conductivity variable rather than fixed. The first control unit dynamically adjusts the startup voltage of the high voltage conduction tube based on the number of data erasing operations performed. By controlling the gate voltage of the conduction tube, the system optimizes the transfer of erasing signal voltage to the storage units, ensuring effective erasing without requiring an increased high voltage generation unit area.
2Power
If the startup voltage for high voltage conduction tube is increased to maintain maximum voltage output, then the maximum voltage output is maintained, but the area of high voltage generation unit is enlarged
Solution Approach 1:
The patent applies parameter changes by modifying the startup voltage parameter of the high voltage conduction tube based on operational history. The first control unit changes the gate voltage parameter of the conduction tube according to the number of data erasing operations. This dynamic parameter adjustment maintains the maximum voltage output capability without requiring physical enlargement of the high voltage generation unit, as the system adapts the electrical parameters rather than increasing hardware scale.
Data Source
AI summary
A circuit for erasing data includes: a high voltage generation unit, adapted for generating an erasing signal; a first control unit, adapted for modifying the erasing signal to a first conduction control signal with a decreased voltage ascending speed; a second control unit, adapted for sending a second conduction control signal based on the first conduction control signal; a lift unit, adapted for lifting an output voltage for erasing data based on the first conduction control signal; a switch unit, adapted for forming an electrical access between the high voltage generation unit and the output end of the circuit for erasing data; and a reference current generation unit, adapted for providing a bias current to the first control unit and the second control unit. Under a circumstance that erasing effect of storage units is improved, area of a chip is relatively reduced by using the circuit for erasing data.